Wheeled scraper



Dec. 8, 1942. Tfo. DAVIDSN ETAL wHEELED scRAPER Filed Nov.A 9, 1940.-

4 Sheets-Sheet 3 ATTORNEYS;

Patented Dec. 8, i942 UNITED STATES l u 2,304,016 a wminLEn semina" sTrevor ofnnvidson, yiwiiwenitee,4 and Boxer Q Sherman Hoax, SouthMilwaukee, Wis.','assign ors 'to Bucyrus-Erie Company, South .Milwaukkee, Wis., a corporation o! Delaware l 'Annotation Npveniber s,V mitmA364,93 t is chime. .toigjsfjz -izimiy i Our invention relates to newand useful provementsliri wheeledscrapers of the general' posingdumping.. i type shownand described in 'U. S. Patent No.v l 2,152,899,Ygranted April 4,A 1939, to Earl. B. Muloon, to which patent referenceisherebyj. made, inasmuch as this present invention represents animprovement;thereon.l

'tated, we have worked out a. number of novel *asftl'ief descriptionprogresses. f Y .l Our invention consists in the novel parts and and., iisefu1 details, which will befreadily evident n In Scrapers' of thattype, the bowl fills. and in the `combination and' arrangement,thereof..

dumps at its front end. which are defined iiithe yappended claims, and-The main frame of such a scraper is -pivotedlo of Awhich threeembodiments arelfexemplifled in' Y atveither its front end or rear endto a wheeled the accompanying drawings, whichare hereintruck and thedigging:V and spreading depth after particularly described vfindeXPlaineii-l l determined by raising Vorqlowering the other endThroughout the description, the Ysame, referwith respect teafseeondtruek.. This is theiirstv ence number is applied to the samemember or operating function. y l f 15 vtosirnilar members., s.

In Maloon and this present invention,`V Figures '1, 2 and 3 ere Verticallcngitildinl f l oting is`,at the front end, and the raising` and`'-'S'e'CiQHSO 011e fcrln 0f Our Scraper, 1n digging.`

lowering takes place Yat the rear'end; but thispalthough veryadvantageous, is not essential.Y f* butY without showing the winch., gThe digging binde -is .carriedk rigid with the t0"` Figure 4 1s a' planView of this variant. takenicarryng, and dumping positions respectively,

main frame, though this is not essential. "aldng the lines 4--4 ofFigure 2. and illcllltilllg'y Adjacent the digging blade is .pivoted -adirtthe winch Awhichcontrols three of thefunctions.'v

extruding curved member, variousiy termed. "Figure isan enlarged planView of the winch For conformity with the nomenclature of- .the DerSe.1n0re1n detallf. v v, A Maloon patent,'it willv here be called a.fbowl. 25 Figure 6' is a side elevation of this winch.

Swinging this bowl upward to dump is the` Sec'. Figure 7 is a verticallongitudinal section corond function.l Returning it to load-carryingposiresponding to a portion of Figure 2.-but showing tion is the thirdfunetion,4 alternative bowl return means, i and` `showing There is alsoa front closure, known as thel Y dctied'ihe Semefin afDOSiliOn'cclrespcndingftc apronf Opening this apron (when-diggingfor 30 Fiel-1F61dumping), and closing it again for carrying, isA `Figures 8. 9 and-10ere AVertical longitudinal the fourth function.

sections of asecond form of our scraper, in dig-1 Maloon has twocontrols (ropes), one of which ging Carrying" and dumping positions'`1`o$peo l performs the first function (namely depth-cone liiVeilf- Atrol), and the other of which successively per- 35 Figure 11 is a planView' 0f this Varianti taken* forms the fourth function (apronopening)and along tho lines Il H of Figure 87 the second function (dumping). Forthe third Referrmg n owto Figures l to 4'.We soo 'that function (bowlreturn),Maloon depends on grav` the implement to Whloh We have.applledvour ity although in another. patnt. (No. 2,198,916' invention,includes aforward truck 2|,.and a s i0v rear truck '22,supportedrespectively on'two for-y granted April 30, 1940) he performsthis funci tion. by a kikmack Cam-actuated by the fau of ward wheels 13,and four rear wheels 24. f The the apron. Y It is'the principal objectof our present invention to employ two controls, one of which per- 45forms the rst function (depth control) ,t and the other of which'performs the fourth functionl (apron opening). A lag interlock between`apron opening and the second function (dumping) performs this'secondfunction. l 50 A further object is to devise alternative novel means toperform the third Afunction,(lo'owl dre'- such truck, we could supportone end of the mentioned in our claims. t

forward -truck- 2l is rigidly secured to twol side plates 25, preferablyhaving substantially "the outline indicatedv in Figure 2. In placeofeither scraper onl they propelling vehicle; such suIiDOrtl thenconstituting one of the'ground.. supports` These parts .constitutelparts ofthey frame of ythe implement, and in accordance with the in- YVention they are connected together in sucht a.` Way as to enable theshoe=.26, which is located.

turn) by Seme constant, teIiSiOii means (Such aS forward of Athe bowl21, torkbe raisedl or lowered, the dead end of the first .listedcontrol, 0r a at will with respectAv to ythe ground level.` In 5Prmg) so'Comm/ed as to mltate the bowl re' 55 Orderv to accomplish this, `therear truck -22 is spirit of our invention.

bowl. amiafconuntsfk.ma 'strangergimtisi'mpoint about midway between thetwo trucks, at which point the arms 28 are connected by pivot bolts orpins 28 to the side'plates.4 Rigidly secured to the side 'plates 25. wepro-- vide a transverselower bea 30,- and. an upper '27 f i a,`so 4,o7e"v preferably provided with rigid forwardly pro- Jocting side arms2l thatextend forwardly to av beam-3|.' which latter beam may if 'desired bemade of 'lighter' construction than the lower beam. The shoe 26 ispreferably rigidly secured at its ends to the side plates 25, andpreferably ,includes an inclined blade 32 that cuts intoL the earth whenthe bowl 21 is being filled. Adjacent the shoe and'preferably at itsrearedge, thev bowl 21 is pivotally mounted on a transverse pivotbarain'g'bladeis, carried by the main frame, we do not intend to linit thisto directfcarriage; The

blade might, for example,l be `carried by thebowl forward of itspivot,jwithout departinglfrom' .the

The rear end ofthe bottom yplate 3l -of lthe vbowl 21 is preferably bentupwardly to'form an intiem] disi'ied rear head 3510! thebovvLl f wnenthebowl 21 is m the" posmun of restas 'I indicatedrin Figures 1 and 21, thestop bracket together, thus tntmgthebowir j ingposition as shownL inFigures 1 andf2, to its e i n. wnen, in the claims, we state thatmenig-Q er assists nor resists dumping, "This reach also serves somewhatthe purpose ofa 'shock'r-absorber, after sheaves and I5 have been" drawnblock toblock.

Rope 41 controls che second usted function', 3

namely dumping. It passes, from the winch, un-

der oneof fairlead sheaves, over one of fairlead sheaves 42, 'over oneof sheaves I Laround sheave 48 on; the top of the bowl 21, and back toan anchorage 49 adjacent sh wes 43. Drawingfin on this rope l1 drawssh'jc-its carrydumping positionas'shown in Figure 3. Y

ARope 50V controls. the fourth listed function, namely apron. opening.It passes, from` the winch, under one of Ythe fairlead sheaves ,over fone of the fairlead'sheaves 42, over one of theA sheavesy 0, and .thencedown and aroundthe sheave Il on the apron 3 1, and back to an an-r ichorage adjacentsheaves I 'Drawing-in on )L -carried by the rear 'end ofthe'gbowl, rests i bOWl.

position so that as theldirt passes up `between the l ioweredgeanofthejapron a1 vand theshoe-zs;

fhedirt pilingup-jin the'bowll. can lravitatev intov the. apron,"after-.whichftheapron.I1 can be movedto a closed positionfsofas to retain the;load. *7 Iheapron is plvotally-supportedon pivot Pins Il. s

A rn. this mamar-variant ofjourinvenuon. we employ three control cables,`the reevina' of which will now be described,still with referencetoFlz-fureslto4.

. Cabiella controls thefflrst':listedv functiom, .namely depth-c :ntrol.Itfpasses, from thewinch "(later tobe described; not shown in Figui-esltor I 8). .under one of fairlead sheaves Il, over onefof f fsirleadvtheaves- 42 jover one nflwlves 43; and

- sn'd/orffby locating anch'oragelfilower,V part of thedumpmscycIe-thisreach 'passes-through dead center, andithus: neith-vveratimes around sheaves "M lon'rthe" fr truck 22, and sheaves jon the-iside plates 2l. v 'l'hencefitg.to'ananchoraae onlthefr'ear f OffChmbQWl; T- DISWiPg-,nlmi 1'.0P

'-.`drawsfslieavesuf.andfli together, asfshown;

rand c thusf-msme theljdlssina majos'l '37oE f #uses desiree-themuseos-ofthe nach -bsffincreasedg' locating sheaves* 4,413higherl`tastesbait other 0E ed as shown atf *on the-rear of'theftractor Mifwhichdrawsfourfscrapen as 'own inl Figure 4. Ifjso mounted, itma'ybevactuated by engine of-thejtractor in'gany convenient manner.

(J1-:it may be mounted elsewhere, as forexample iscontrolled-:byconefclutch58 and band-brake Il, inw'ell-understoodmanner; Drum Il: oper;

,uente drum-n, that-"stop el on drumu occuclutches ydr'tuxrllfwhich then.starts to r'evolvecloekwise, pullinginc'm rope and Samnaun@ umilllrlnlln its'two yurti-eine positional yIn' place o f f @rope'llltoraise the'digging edge byraislngr rear'en'dofthe main frame, vwenow'have ropel "a, reeved identically as vrope 4I. except thatL se'gamasimi-'wd this une inzjin =on r9pe'j41, and-thereby. raisins the,bowl rope a is dead-ended at 68', adjacent sheaves that rope: s'.` rope,connectinzthe bowlto the' 4l. main frame, to dump the bowl; lost-motionWe now come to the variant of Figures titoA 11. means, actuableby ,theapron opening. means,

- Identical parts bear the same reference-numbers after the apron hasopeneda predetermined d1s i s as in Figures 1 t0 4, and 7, and will notbe lre- 5 tance, to cause delayed actuation of the dumping describedhererope; and tension means, tending' toinitiatethe There is no rODe 41t0 Control the bOWl 2 1. But return of the bowly from dumping tocarrying the same lag-actioncontroi is eie'ctdvin another position,'said tensionmegns being 4 applied to, 111211111811 which Will n QW bedescrbed- A yIOP@ the bowl at suchuavpoint yand at such an angle s.extends fr Om a, dead end 10 0n apron. 31 t0 10 as to have atendepcylwhen 'b hgzbow] 15111 carryl a dead end on oeting. sheave 1|, whichslides ing pnsition, to` assist, ratherl than *oppose theinguide-ways12. Around sheave 1I, there passdumping rope l M l and at 75 0n the top0f bowl 21 main frame, supportedtherehy; a digging blade, y

` RPES, a and 5 extend t0 an Ordi-n Y-WO- 15" carried bythe main frame;a dumpinganddirtf, drum Wmch 16 preferably on the tracto Ropehoidingbowl, pvoted to the main-*frame adjacent 5159K m lading 905mm(Figure 8)- *eBu' Wh?? v by--the mainframe 'and-adapted,' when lowered,A1 vthe apron 31 is fully opened-for dumphis (Fleto retaindirtwithintherbowlythe*combination dump thelbowi 21.

v spring expedient of Figure 1, or neither;

- holding bowl, pivoted to the main frame di by the main frame, andstdapifreci';,'vvitie'nv ovverf therewith of: a vrope,connecting motionmeans,actua ure 101,1:1115 `rope `es tauns sumcienuyto pully 'gotherewith of, a ropetc-nectmgfmmmm the 0n heavie 7| and hence 0n Tope' nSumckntlyfw; lmein `frame, to. open the apron; :'aj-drivenfwinch v 4vdrum toactuatethatrope; a rope,- Yconnecting i To return the bowl -21fram .dumping 1205112103, the bowl 'to the' 1mmframefwf-uuinpv the bowl;te this variant of our invention can yempioyxeither awinchdrumrtcmtetnat opetnd a last` I the deadend expedient o f Figures 1 t0.4.01` m .25 motionv connection betvveenthesm :two I y l ,wne'rebytherstdrum, aitervrotating toapre-f Having: 110W describe@ andillustrated three determined extent, 'fwxu11mpm-deiayedgrotation, Lforms of our invention, we vvvish'itto be under-f 'to-thjseond j" stoodthat our invention is not to1be 1imited jto j 5;' in] a .scapen-hmundds-pborn- 9'. f the specic form or arrangement of parts hereinjmmfr'm Suppoted'tnerebyyagdiggig blade' described and Smmffit HDW-muy @Wicarriedbythe(mamifrieraafdlimpinz;andidnftf' ered bymllclims'- l"holding bow1pivoted'tothe--min-iraxheadiacent Weclaim: 1 m, fv 1.`In ascraper, having: groundsupport; a mainframe, supported therebyafdiggingb ade,

carried by the .main frame; "s vaumpuigfqui rt 1 -the biadei vand. afrontgaprongipvotaliy supported.

the blade; and` a front'aprongpivotallyte retain within thejbowip-th-cmbinatio 'IIS wine mainframe@ @umn by the main' framezand adapted;whnlcweed;

ein; fram i @Miet-fever to retain 'ditlwithinL the 'bowi';the'combination O l therewith of: a rope, connecting the apron tothe f{elmentpto somek other portion oi the machine main frame, to open theapron; means to actuate v Whih other' portion the dumping the frame andadaptedfwnen lowered: "1'

opeiandthe apron, 'whereby fm1-1 atemeans' forresbeibivel'usins thedum-p'- gearwardiyziromthe' dumping and dirt-holdin: 1 v Y than oppose,the dumping y. l 10. A scraper according to claim 5, characanddirt-holding element is relatively moveable, 5nd tending t0 initllte thereturn of that element v8. A scraper, according to claim 7,characterized by the tact that said` tensionI means is a`spring'operatively connecting the dumping and dirt-holding element tosome other parto! the v from dumping to dirt-holding position. i

scraper, with respectv to which other part said element is relativelymovable during dumping., -9. A scraper, according to claim .7, characterized by the fact that saidtension means isa spring operativelyconnecting the dumping and 'dirt-holding element to some other part ofthe scraper, with respect to which other part'said element is relativelymovable during dumping;

and by the further Vfact that said spring is applied to said element atsuch a point and at such an angle as to have a tendency, when said'element isin dirt-holding position, to assist, rather rope.

terized by the fact: that the lost-motion means,V

-which operatively connects the dumping rope and the apron, comprisesthe apron around a sheave fixed with respect 'to the main frame toanvactuating connection with a floating sheave, which oatin'g sheave'engag 'the dumping rope.

11. A scraper accordingrto claim 5, charac" terized by the facts: thatthe lost-motion means,

- which operatively' connects the dumping rope and the apron, comprisesa rope extending from the apron around asheave fixed with respect to themain frame to an actuating connection with a floating sheave, whichiioating sheave engages the dumping rope; and that there are guides fortheoating sheave.

tuate that rope;

12. In a scraper, having: ground n digging b1ade;'a dirt-extruding rearelement, capablo of being shifted to extrude dirt: a dirt-retainingiront apron, capable ot being opened and V a main body capable. inconjunction with'the dirtextruding element-and the apron, ofserving as adirt-holding container; the cox'nbinationv v therewith or: fa rope 'toopen the apron: means I to actuate that rope; a rope. tov shiftjtheextrude dirt; neans to ac? andlost-,motion means, vactuextruding-Velement to able by theapron opening means, vafter the apron has opened apredetermined distance,-tocause delayedactuation of the `dirt-extrudingvrope.' `f

13. I n a scraper, having: two ground supprtsi' p pivoted'to one of suchsupporta,

amain frame, andcapable of being raised' and loweredwith respect -to'the otheroi such blade, carried by the main frame; anda and dirtfholdingbowl, pivoted to thetxnainr Yframe',.adjacent blade;v VtheLfcombinationtherewithof: a rope connecting thefmain frame pto the'second mentionedsupport to` raise" and a rope extending from lowefrgthedrame; means toactuate thatrope:` a ,y .A n bowl to the main vtrainato dump the bowl;means toactuate thatprope; ,and

anzoperative connectionbetween the frame-raisf' 1 Y bowLQtending toinitiate the .refl Y turn of the bowl'froln dumping to carrying posifVtion, said operauve connection being appliedto, point and atsuchlanangle as to have a tendency, when the bowl is 'in carrying* position, toassist, rather than oppose, the

ropetfconnecting the ing| ropeand Vthe the bowl at such-,a

ingrope.y V

"rREvoR o. DAVIDSON.'`-4 Vj ROGER SHERMAN Horus.`

support: a

suppprts; a' digging,v

dump-y y

